JP3003083B2 - Scooter type motorcycle - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a scooter type motorcycle, and more particularly to a vehicle body structure for providing a storage space in a front part of a vehicle body.

[Conventional technology]

2. Description of the Related Art Conventionally, as a scooter type motorcycle having a storage space in a front portion of a vehicle body, there is one disclosed in Japanese Patent Application Laid-Open No. 64-28087. In this motorcycle, a bearing member for supporting a front fork is provided at a front end portion of a front frame made of a single tube, and a pair of left and right support members that are curved sideways from the front end portion of the front frame and extend upward. The handle shaft is supported at the upper end of the member, and the handle shaft and the front fork are connected via a steering bar curved so as to bypass the rear of the steering axis. That is,
In this motorcycle, a storage space is provided in a space below the steering wheel and surrounded by left and right support members, a steering bar, a front frame, and the like.

[Problems to be solved by the invention]

However, the conventional motorcycle configured as described above has a structure in which all the related members such as the front fork and the handle are supported by the front end portion of the front frame. In this case, an impact from the front wheel is applied to the front frame. The force is concentrated on the joint between the front end portion and the front fork bearing member, and the force transmitted from the occupant to the handle is concentrated on the attachment between the front frame and the support member. For this reason, it is necessary to make the front frame, the front fork bearing member, the handle support member, and the like thicker and thicker, or to reinforce them with gussets or the like. Was.

[Means for solving the problem]

A scooter-type motorcycle according to the present invention includes a main frame extending downward from a head pipe that supports a front fork, and left and right frames connected to the main frame and extending upward. A shaft support is provided to support the handle shaft at a distance from the head pipe, and a middle pipe of the left and right frames and the head pipe are connected by a connection pipe, and the handle shaft and the front fork are bent for curved steering. The space connected by the bar and surrounded by the left and right frames, the head pipe, and the steering bar is a storage space.

(Operation)

The head pipe supporting the front fork is supported at multiple points by a main frame extending downward therefrom and connecting pipes extending from the left and right frames, and the left and right frames supporting the handle are supported at multiple points by the main frame and the head pipe. For this reason, the load from the steering wheel and the impact from the front wheels are distributed to each part of the frame.

〔Example〕

Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 1 is a side view of a scooter type motorcycle according to the present invention, and FIG. 2 is an enlarged side view showing a main part of the scooter type motorcycle according to the present invention. In FIG. Shown. FIG. 3 is a plan view of the frame, and FIG.
The figure is a front view of the frame. In these figures, reference numeral 1 denotes a scooter. The scooter 1 is provided with a low-floor footrest 4 between a handle 2 and a seat 3, and a vehicle body cover 5 which covers a lower portion of the seat 3 is provided at a rear portion. I have.

Reference numeral 6 denotes a front wheel of the scooter 1, reference numeral 7 denotes a rear wheel, the front wheel 6 is supported by a head pipe of a frame 9 to be described later via a front fork 8, and the rear wheel 7 is a frame via a unit swing type engine 10. 9 is swingably supported at the rear. In addition, 11 is a carburetor of the unit swing type engine 10, 12 is a fuel tank, 13 is a rear cushion unit interposed between the unit swing type engine 10 and the frame 9, and 14 is inside the body cover 5. It is a storage box that is stored. This storage box 14,
The upper opening portion is configured to be opened and closed by the seat 3, and is supported by a rear portion of the frame 9. Reference numeral 15 denotes a helmet stored in the storage box 14.

The frame 9 is formed symmetrically by bending a pipe material, and is provided with a left frame 9a and a right frame 9b extending in the front-rear direction on left and right sides of the vehicle body.
A main frame 22, which will be described later, is located between a and 9b. A front portion of the frame 9 located on the front side of the footrest portion 4 is extended upward from the footrest portion 4 and bent in a side view shape. The frame 9b is connected. In other words,
The front portion of the frame 9 is formed in a front view gate shape as shown in FIG. And this frame 9
An upper pipe 16 for supporting the steering wheel 2 so as to be steerable is fixed to an upper end of the upper pipe 16. The upper pipe 16
In this embodiment, a steering shaft A passing through an axis of a head pipe for supporting a front fork 8 described later is arranged on the same axis as a steering axis A, and a handle shaft 2a of the handle 2 is attached to the upper pipe 16 as an oilless bearing. It is rotatably supported via a synthetic resin bush 17.

Reference numeral 21 denotes a head pipe which supports the front fork 8 so as to be steerable.
9a and 9b together with a main frame 22 constituting the scooter frame 9 and a left and right frame 9 via a connecting pipe 23.
a, 9b, and is disposed on the steering axis A and below the upper pipe 16 at a predetermined distance. The main frame 22 is positioned at the center in the vehicle width direction. The rear end of the main frame 22 is joined to a cross member 24 that connects the left frame 9a and the right frame 9b with the footrest 4. The front end is located at the rear of the head pipe 21. Are combined. Further, the connecting pipe 23 is connected to the steering axis A from the vicinity of the portion of the left frame 9a and the right frame 9b that is bent in a side view.
And is coupled to the side of the head pipe 21. That is, the head pipe 21 is supported by the frame 9 at three points. The front fork 8 is a leading link type in which a cushion unit 25 is built in a pair of left and right fork bodies, and a steering shaft 8a is supported by a head pipe 21 via bearings 26 and 27. . In this embodiment, tapered roller bearings are used for the bearings 26 and 27.

Reference numeral 28 denotes a steering bar for connecting the front fork 8 and the handle shaft 2a to steer the front wheel 6 in accordance with a handle operation. The upper end of the steering bar 28 has a handle shaft 2a.
The lower end is connected to the front fork 8, and is curved in a direction orthogonal to the steering axis A. In this embodiment, the bending direction is set such that the steering bar 28 is located in front of the head pipe 21 when traveling straight. Note that the bending direction of the steering bar 28 can also be directed backward, contrary to the above-described direction.

Reference numeral 29 denotes a front body cover, and reference numeral 30 denotes a front storage box installed in the front body cover 29. The front storage box 30 is disposed in a space surrounded by the left frame 9a, the right frame 9b, the head pipe 21, and the steering bar 28, and a portion corresponding to the head pipe 21 includes the head pipe 21, the main frame 22 Further, a bottom plate 30a that covers the upper side of the connection pipe 23 is provided. Also, this front storage box 3
At the rear of 0, a luggage doorway is opened. The luggage doorway is configured to be opened and closed by a lid 31 that is swingably provided on the front vehicle body cover 29.
Reference numeral 32 denotes luggage such as notebooks and books stored in the front storage box.

In the scooter 1 configured as described above, the steering bar 28 swings in the front body cover 29 by operating the steering wheel, and the front fork 8 is rotated. To store the luggage 32 in the front storage box 30, the front body cover 29
The lid 31 may be swung open as shown by the two-dot chain line in FIG. 2, the tip of the load 32 may be inserted into the back, and leaned against the bottom plate 30a.

Therefore, as shown in the present embodiment, the handle 2 and the head pipe 21 are supported at different portions of the frame 9, and the head pipe 21 is supported at three points on the frame 9 by the main frame 22 and the connecting pipe 23. Then
The load from the steering wheel 2 and the impact from the front wheels 6
Will be distributed to each part. Therefore, each pipe for supporting the head pipe (the left and right frames 9a and 9b, the main frame 2, the connecting pipe 23, and the like) can be formed with low rigidity.

Note that in this embodiment, the notebook,
Although an example in which a plate-like luggage such as a book is stored is shown, a helmet can be stored as shown in FIGS. 5 and 6.

5 and 6 are views showing another example in which the helmet is stored in the front storage box. FIG. 5 is a side view of the helmet storage section, and FIG. 6 is a front view of the same. In these figures, the same or equivalent members as those described in FIGS. 1 to 4 are denoted by the same reference numerals, and detailed description is omitted. 5 and 6, reference numeral 41 denotes a helmet storage box installed in the front vehicle body cover 29, and reference numeral 42 denotes a helmet. In the helmet storage box 41, the upper front side portion is bulged forward as compared with that of the above-described embodiment because the helmet 42 is stored.
The steering bar 28 and the front body cover 29 also have an upper front portion extending forward to avoid interference with the helmet storage box 41. Even with such a configuration, the same effect as in the above embodiment can be obtained.

〔The invention's effect〕

As described above, the scooter type motorcycle according to the present invention includes the main frame extending downward from the head pipe that supports the front fork, and the left and right frames connected to the main frame and extending upward. At the upper end of the head pipe is provided a shaft supporting part that is spaced apart from the head pipe to support the handle shaft, and the middle part of the left and right frames and the head pipe are connected by a connecting pipe,
The handle shaft and the front fork are connected by a curved steering bar, and a space surrounded by the left and right frames, the head pipe, and the steering bar is a storage space. The main frame extending downward therefrom and the connecting pipes extending from the left and right frames are multi-point supported, and the left and right frames supporting the handle are multi-point supported by the main frame and the head pipe. For this reason, the load from the steering wheel and the impact from the front wheels are distributed to each part of the frame.
Therefore, each pipe for supporting the head pipe can be formed with low rigidity, and the weight of the vehicle body can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a scooter type motorcycle according to the present invention,
FIG. 2 is an enlarged side view showing a main part of the scooter type motorcycle according to the present invention, FIG. 3 is a plan view of the same frame,
Fig. 4 is a front view of the same frame, Figs. 5 and 6 are views showing another example in which the helmet is stored in the front storage box, Fig. 5 is a side view of the helmet storage section, and Fig. 6 is the same. It is a front view. 2 Handle, 2a Handle shaft, 8 Front fork, 9 Frame, 9a Left frame, 9b
Right frame, 21 Head pipe, 22 Main frame, 23 Connecting pipe, 24 Cross member, 28 Steering bar, 30 Front storage box, 41 Helmet storage box.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B62J 9/00

Claims (1)

(57) [Claims] A main frame extending downward from a head pipe for supporting a front fork; and a left and right frame connected to the main frame and extending upward, the upper and lower frames being separated from the head pipe at upper ends of the left and right frames. A shaft support portion for supporting the handle shaft is provided, the middle portion of the left and right frames and the head pipe are connected by a connection pipe, and the handle shaft and the front fork are connected by a curved steering bar. A scooter-type motorcycle characterized in that a space surrounded by the left and right frames, the head pipe and the steering bar is a storage space.